Compare on six dimensions, in order: underwriting (how pre-existing conditions are handled), outpatient cover (full, capped or none), hospital list, excess, mental health cover and cancer cover depth. Two quotes £12 a month apart can differ by thousands of pounds at claim time — the headline price tells you almost nothing until the six dimensions match.
- ✓Six dimensions decide a policy: underwriting, outpatient, hospital list, excess, mental health, cancer depth.
- ✓Never compare prices until the specifications match — a cheaper quote usually covers less.
- ✓Brokers are whole-of-market and typically free to you — commission comes from the insurer.
Why headline price misleads
Health insurance quotes are not like-for-like by default — they're closer to laptops than lottery tickets. One insurer's default quote includes £1,000 of outpatient cover, another's includes none; one sits on a national hospital list, another on a guided panel; one carries a £100 excess, another £250. Each of those levers moves the premium 10–25%, so a £62 quote and a £74 quote may describe wildly different products — and the cheaper one is usually cheaper because it does less.
Brand is the other false signal. The famous name isn't reliably the best policy for you, and the unfamiliar one — WPA, The Exeter — regularly wins on specific dimensions like out-patient flexibility or claims service. The method that works is boringly procedural: fix the specification first, then let insurers compete on price for that specification. The rest of this page is that method.
The six dimensions that decide a policy
- Underwriting. Moratorium or full medical underwriting, and each insurer's exact terms for pre-existing conditions. This decides what's covered at all — it outranks everything else. If you're switching insurers, ask about continued underwriting (CPME) to preserve your position.
- Outpatient cover. Full, capped (commonly £500–£1,500 a year) or none. Decides whether diagnosis is funded — a single pathway of two consultations and an MRI can exhaust a low cap.
- Hospital list. Which hospitals you can actually use, and whether one near you is on it. Tiers move premiums roughly 10–25%; London lists sit at the top.
- Excess. £0–£500+, usually applied once per policy year. Each step typically moves the premium 10–20%.
- Mental health cover. Often an option, not a default — check inpatient as well as outpatient therapy limits, in sessions and pounds.
- Cancer cover depth. Where policies differ most: some cover every stage including advanced drug therapies; others restrict or exclude parts of the pathway. Read this section even if — especially if — you never expect to need it.
A worked comparison: £62 vs £74
Two illustrative quotes for the same 42-year-old. On price alone, Quote A wins by £144 a year. Line them up on the six dimensions and the picture inverts:
| Quote A — £62/month | Quote B — £74/month | |
|---|---|---|
| Underwriting | Moratorium | Moratorium |
| Outpatient cover | None | £1,000/year |
| Hospital list | Guided panel, insurer picks consultant | National list, open referral |
| Excess | £250 | £100 |
| Mental health | Not included | Outpatient therapies included |
| Cancer cover | Core cover, some drug limits | Full cancer pathway |
In a year with one diagnostic pathway (two consultations plus an MRI, roughly £800), Quote A's holder pays that £800 plus a £250 excess on any admission; Quote B's holder pays £100. Quote A's £144 annual saving is gone twice over in one ordinary claim — before counting consultant choice, therapy cover or the cancer terms. Neither quote is 'wrong': A is a reasonable treatment-only-style budget policy if chosen knowingly. The failure mode is believing you bought B's cover at A's price.
Run the same exercise the other way, too: if you'd genuinely never claim for outpatient care — you'd use the NHS for diagnosis and only want surgery insured — then Quote B's extra £144 a year buys cover you've decided not to use, and A is the rational purchase. The point of the table isn't that more cover always wins; it's that the decision should be made looking at the specification, with your own likely claiming pattern in mind, rather than at two prices.
Six dimensions, one quote form
The classic comparison mistakes
- Comparing defaults, not specifications. Each insurer's quote journey defaults differently. Set every lever yourself — same outpatient level, same excess, same list — before reading a single price.
- Treating underwriting as fine print. Two policies can be identical on paper and behave completely differently for your medical history. When switching, moving without continued underwriting can reset your pre-existing position.
- Buying the brand. Familiarity is not cover. The right question is never 'is this insurer good?' but 'is this specification right, and who prices it best?'
- Ignoring year two. Some attractive first-year prices rely on discounts that unwind at renewal, and renewal pricing behaviour differs between insurers. Ask what happens to the premium after a claim and after a birthday.
- Comparing once, forever. The market re-prices annually; loyalty is rarely rewarded. Re-compare at every renewal with your current insurer's renewal quote as the benchmark.
Where brokers fit — and a 20-minute DIY method
The six-dimension comparison above is precisely what a specialist PMI broker does all day: they're whole-of-market, they know each insurer's underwriting quirks and renewal behaviour, and they cost you nothing directly — commission is paid by the insurer and is broadly similar across them, which keeps incentives reasonably clean. For anyone with medical history, a family policy, or simply no appetite for benefit tables, a broker is the sensible default; our broker vs direct guide weighs it fully.
Going DIY? The compressed method: (1) fix your specification on the six dimensions; (2) shortlist with IPIDs, which put every insurer's summary in the same format; (3) get three quotes to the same specification; (4) verify the two finalists against their actual benefit tables using the ten-minute document method; (5) only then compare prices. Twenty minutes, done once a year at renewal — against premiums of roughly £960 a year and rising, it's the best-paid twenty minutes in your financial calendar.
Frequently asked questions
What should I compare when choosing health insurance?
Six dimensions, in order: underwriting terms (how pre-existing conditions are treated), outpatient cover level, hospital list, excess, mental health cover, and cancer cover depth. Fix all six to the same specification across insurers, then compare price last. Two quotes a few pounds apart can differ by thousands at claim time if the dimensions don't match.
Why is comparing health insurance on price alone a mistake?
Because quotes aren't like-for-like by default: insurers' standard quotes differ on outpatient cover, hospital list, excess and referral rules — each moving the premium 10–25%. A cheaper quote is usually cheaper because it covers less. In our worked example, a £62 quote costs its holder £900+ more than a £74 quote in one ordinary claim year. Price only means something once specifications match.
Is there a comparison site for health insurance like for car insurance?
Not really — and the products are why. Health insurance has too many interacting levers (underwriting, lists, limits, options) for meaningful single-price ranking, so aggregator results mislead more than they help. The market's substitute is specialist whole-of-market brokers, who compare configured like-for-like quotes across insurers, typically at no direct cost to you. Or DIY: same specification, three insurers, benefit tables checked.
How do I compare health insurance quotes fairly between insurers?
Force the specification to match before reading prices: same underwriting basis, same outpatient level (or its nearest equivalent), same or comparable hospital list, same excess, mental health on or off in both, and read the cancer sections side by side. Insurers' options don't map perfectly — a broker can translate equivalences — but a self-built spec sheet gets you most of the way.
Which matters more when comparing policies: excess or outpatient cover?
Outpatient cover, usually — it's the bigger money. An excess costs you at most its face value once per policy year (typically £100–£250), while having no outpatient cover can cost £800+ in a single diagnostic pathway of consultations and an MRI. Excess is also easy to adjust at renewal; outpatient structure shapes how the whole policy behaves. Compare outpatient terms first, then tune the excess.
Should I compare health insurance policies on cancer cover?
Yes — it's where policies genuinely differ most, and the dimension you least want discovered at claim time. Some cover the full pathway including advanced and experimental drug therapies; others limit stages, settings or drugs. Compare the cancer sections of the actual policy documents, not marketing summaries, and treat meaningful differences as worth more than £10–£15 a month of premium difference.
Do brokers really compare the whole health insurance market?
Specialist PMI brokers are typically whole-of-market across the insurers that matter — Bupa, AXA Health, Aviva, Vitality, WPA, The Exeter and the smaller names — and know each one's underwriting quirks and renewal behaviour. They're paid by insurer commission at broadly similar rates, so the advice is usually free to you and incentives reasonably clean. Ask any broker to confirm their market coverage and remuneration; good ones volunteer it.
How often should I re-compare my health insurance?
Every renewal — annually. The market re-prices constantly, renewal increases vary by insurer, and loyalty is rarely rewarded. Use your renewal quote as the benchmark and re-run the comparison to the same specification. One caution: switching insurers can affect your underwriting position for conditions that arose while covered, so compare switching with continued underwriting (CPME) terms where available rather than starting fresh.
Can I compare health insurance myself without a broker?
Yes, with about twenty minutes of method: fix your specification on the six dimensions; shortlist insurers using IPIDs (standardised two-page summaries built for comparison); get three quotes to the identical specification; verify the finalists against their real benefit tables; compare prices last. It works well for straightforward, healthy applicants. Medical history, families and switching with continuity are where broker expertise earns its keep.
What information do I need before comparing health insurance quotes?
Your date of birth and postcode (both move prices), who's covered, your medical history in honest outline (it determines underwriting outcomes and which insurers suit), your nearest private hospitals (to sanity-check lists), and your priorities ranked: budget ceiling, outpatient appetite, mental health cover, cancer depth. Ten minutes assembling this turns quote-gathering from guesswork into specification shopping.